Switzerland 376-77 Postal Conference - 1959 Mint Set of 2

These stamps were sold only at a special post office at the European Conference of PTT (Post, Telegram and Telegraph) Administrators in Montreux and were valid for 11 days on mail posted at the conference, making it one of the rarest and most desirable issues in modern Swiss history! From an old dealer's stock we found a number of fresh, mint, never hinged sets.